Kinematic adjustability of unilateral external fixators for fracture reduction and alignment of axial dynamization

Ou, Y.J.

doi:10.1016/j.jbiomech.2009.05.002

Cited by 4 publications

(2 citation statements)

References 16 publications

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“…In this study, only one bone pin at each bone segment is considered for rigid-body in kinematic analysis. This usage method has been reported in a previous article [ 17 ].…”

Section: Methodsmentioning

confidence: 99%

The Influence of Pin Deviation on the Fracture Correction and the Fixator Adjustment with Sensitivity and Kinematic Analysis

Zhao

2018

BioMed Research International

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Fracture correction is important orthopedics operation and can be performed by unilateral external fixator. Due to pin deviations being inevitable during the operation, searching the impacts of pin deviation on the fracture correction and fixator joint adjustment are important. This study puts forward evaluation index with sensitivity analysis for investigating the impact of three orientation deviations and three position deviations on fracture correction. Meanwhile, based on a clinical case from a 28-year-old female, the influence of pin deviation on the adjustment of fixator joints was analyzed by inverse kinematic method. Different pin deviations have different sensitivity; the sensitivity of orientation deviation is relatively larger than position deviation. The existence of pin deviation will result in the change of the adjustment value of fixator joints. In addition, the experiments of seven situations were established to verify the analytical results. This study revealed the sensitivity of different pin deviations which can also be used to predict the adjustment value of fixator joints and the accuracy of fracture correction. This research also helps to reduce operation time and decrease damage to soft tissue by reducing the frequency of inserting pins.

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“…In this study, only one bone pin at each bone segment is considered for rigid-body in kinematic analysis. This usage method has been reported in a previous article [ 17 ].…”

Section: Methodsmentioning

confidence: 99%

The Influence of Pin Deviation on the Fracture Correction and the Fixator Adjustment with Sensitivity and Kinematic Analysis

Zhao

2018

BioMed Research International

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“…Successful bone fracture outcomes depend on adequate stabilization during the healing process. [2][3][4] One of those additional methods involves the use of a bone stabilizer. 5 It has been suggested that composites, based on a silorane resin as the matrix, are potential candidates for polymeric bone stabilizers.…”

Section: Introductionmentioning

confidence: 99%

Estimation of properties of a photoinitiated silorane‐based composite with potential for orthopaedic applications

et al. 2011

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We have synthesized a filler-reinforced silorane composite that has potential applications in orthopaedic surgery, such as for a bone stabilizer. The purpose of the present work was to develop a method for estimating four properties of this material; namely, maximum exotherm temperature, flexural strength, flexural modulus, and fracture toughness. The method involved the use of mixture design-of-experiments and regression analysis of results obtained using 23 formulations of the composite. We validated the estimation method by showing that, for each of four composite formulations that were not included in the method development, the value of each of the aforementioned properties was not significantly different from that obtained experimentally. Our estimation method has the potential for use in the development of a wide range of orthopaedic materials.

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Biomechanical features of six design of the delta external fixator for treating Pilon fracture: a finite element study

Ramlee

Sulong

García-Nieto

et al. 2018

Med Biol Eng Comput

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Pilon fractures can be caused by high-energy vertical forces which may result in long-term patient immobilization. Many experts in orthopedic surgery recommend the use of a Delta external fixator for type III Pilon fracture treatment. This device can promote immediate healing of fractured bone, minimizing the rate of complications as well as allowing early mobilization. The characteristics of different types of the Delta frame have not been demonstrated yet. By using the finite element method, this study was conducted to determine the biomechanical characteristics of six different configurations (Model 1 until Model 6). CT images from the lower limb of a healthy human were used to reconstruct three-dimensional models of foot and ankle bones. All bones were assigned with isotropic material properties and the cartilages were assigned to exhibit hyperelasticity. A linear link was used to simulate 37 ligaments at the ankle joint. Axial loads of 70 and 350 N were applied at the proximal tibia to simulate the stance and swing phase. The metatarsals and calcaneus were fixed distally in order to prevent rigid body motion. A synthetic ankle bone was used to validate the finite element model. The simulated results showed that Delta3 produced the highest relative micromovement (0.09 mm, 7 μm) during the stance and swing phase, respectively. The highest equivalent von Mises stress was found at the calcaneus pin of the Delta4 (423.2 MPa) as compared to others. In conclusion, Delta1 external fixator was the most favorable option for type III Pilon fracture treatment. Graphical abstract ᅟ.

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Kinematic adjustability of unilateral external fixators for fracture reduction and alignment of axial dynamization

Cited by 4 publications

References 16 publications

The Influence of Pin Deviation on the Fracture Correction and the Fixator Adjustment with Sensitivity and Kinematic Analysis

The Influence of Pin Deviation on the Fracture Correction and the Fixator Adjustment with Sensitivity and Kinematic Analysis

Estimation of properties of a photoinitiated silorane‐based composite with potential for orthopaedic applications

Biomechanical features of six design of the delta external fixator for treating Pilon fracture: a finite element study

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